JPH0446419U

JPH0446419U -

Info

Publication number: JPH0446419U
Application number: JP8784790U
Authority: JP
Priority date: 1990-08-24
Filing date: 1990-08-24
Publication date: 1992-04-20
Anticipated expiration: 2005-08-24
Also published as: JP2524880Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係る光アイソレータ
の組み立て図、第２図ａ，ｂ，ｃ，ｄ、及びｅは
第１図の光アイソレータのホルダＢとそれに取り
付けられている光学素子の図で、第２図ａは上面
図、第２図ｂは側面図、第２図ｃは断面図、第２
図ｄは底面図、第２図ｅは第２図ｄの側面図、第
３図ａは本考案の実施例に係る光アイソレータの
断面図、第３図ｂは第３図ａの光アイソレータの
ホルダＢ部分の分解斜視図、第４図ａ、及びｂは
従来例に係る光アイソレータの構成を示す図で、
第４図ａは正面図、第４図ｂは断面図である。図中、１は偏光子、２は検光子、３はフアラデ
ー回転子、５は金属ホルダＡ、６は金属ホルダＢ
、４は永久磁石、６ａ、及び６ｂは溝、６ｆは連
絡孔、６ｇ、及び６ｈは固定部、６ｉは環状突起
、９は金属膜、１０は光学部品、１１は第１の空
洞部、１２は第２の空洞部、１３は連絡孔、１４
は環状突起、５３はフアラデー回転子、５１は偏
光子、５２は検光子である。 Figure 1 is an assembled diagram of an optical isolator according to an embodiment of the present invention, and Figures 2 a, b, c, d, and e are diagrams of the holder B of the optical isolator in Figure 1 and the optical elements attached to it. So, Figure 2a is a top view, Figure 2b is a side view, Figure 2c is a cross-sectional view, and Figure 2c is a cross-sectional view.
Figure d is a bottom view, Figure 2e is a side view of Figure 2d, Figure 3a is a sectional view of the optical isolator according to the embodiment of the present invention, and Figure 3b is the same as that of Figure 3a. An exploded perspective view of the holder B portion, FIGS. 4a and 4b are views showing the configuration of a conventional optical isolator,
FIG. 4a is a front view, and FIG. 4b is a sectional view. In the figure, 1 is a polarizer, 2 is an analyzer, 3 is a Faraday rotator, 5 is a metal holder A, and 6 is a metal holder B.
, 4 is a permanent magnet, 6a and 6b are grooves, 6f is a communication hole, 6g and 6h are fixed parts, 6i is an annular projection, 9 is a metal film, 10 is an optical component, 11 is a first cavity part, 12 is the second cavity, 13 is the communication hole, 14
53 is a Faraday rotator, 51 is a polarizer, and 52 is an analyzer.

Claims

[Claims for Utility Model Registration] 1. An optical element group having a polarizer, an analyzer, a Faraday rotator interposed between the polarizer and the analyzer, and a magnet for applying a magnetic field to the Faraday rotator in a cylindrical holder. 1. An optical isolator whose arrangement is fixed, wherein the cylindrical holder is provided with an air passage that provides ventilation between the space in which the Faraday rotator is arranged and the outside. 2. In the optical isolator according to claim 1,
An annular projection is provided inside the cylindrical holder, each of the optical element groups is supported by the annular projection, and a groove is formed in at least one of the annular projections corresponding to the polarizer and the analyzer. , An optical isolator characterized in that a space in which the Faraday rotator is arranged communicates with the outside. 3. In the optical isolator according to the second claim,
The cylindrical holder is an optical isolator, wherein at least the annular projection is made of metal. 4 In the optical isolator according to the first claim,
The cylindrical holder includes a first cylindrical holder that supports the polarizer.
a cylindrical holder portion, and a second cylindrical holder portion that supports the analyzer.
1. An optical isolator comprising: a cylindrical holder portion; and a structure in which the second cylindrical holder portion is fitted into the first cylindrical holder portion. 5. In the optical isolator according to claim 3,
The optical isolator is characterized in that the optical element has a metal film formed on a joint surface to the annular protrusion except for a portion corresponding to the groove of the annular protrusion. 6. In the optical isolator according to claim 5,
An optical isolator characterized in that the optical element is joined to the corresponding annular projection by soldering.